package com.hmdp.interceptor;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import com.hmdp.utils.RedisConstants;
import com.hmdp.utils.UserHolder;
import io.netty.util.internal.StringUtil;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @description:
 * @author：yanshaoo
 * @date: 2024/2/13
 */
public class RefreshTokenInterceptor implements HandlerInterceptor {
    private StringRedisTemplate stringRedisTemplate;
    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 获取请求头的token
        String token = request.getHeader("authorization");
        if (StrUtil.isBlank(token)) {
            return true;
        }
        // 基于token获取用户
        String key = RedisConstants.LOGIN_USER_KEY + token;
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries(key);
        // 判断用户是否存在
        if (userMap.isEmpty()) {
            return true;
        }
        // 转为userDTO
        UserDTO userDTO =BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
        // 存在，保存用户信息到 ThreadLocal
        UserHolder.saveUser(userDTO);
        // 刷新token有效期
        stringRedisTemplate.expire(key,RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);
        // 放行
        return true;
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        UserHolder.removeUser();
    }
}
